Dockerfile for ruby-packer for Linux

Dockerfile

FROM ubuntu:18.04

RUN apt-get update \
    && apt-get install -y \
       bison \
       curl \
       gcc \
       make \
       pkg-config \
       ruby \
       squashfs-tools \
    && rm -rf /var/lib/apt/lists/*

RUN curl -L http://enclose.io/rubyc/rubyc-linux-x64.gz | gunzip > rubyc \
    && chmod +x rubyc \
    && mv rubyc /usr/local/bin/rubyc

WORKDIR /app
COPY Gemfile /app/
COPY Gemfile.lock /app/

ENTRYPOINT ["/bin/bash"]